Valve-actuating mechanism.



G. B. PETSGHE.

VALVE AGTUATING MECHANISM.

APPLICATION FILED FEB.25,1907.

Patented June 22, 1909.

- INVENTOR WXiQ ATTORNEY.

GUSTAV BIIRXHAIU) PETSUHE, OF Pl'IlLAl)El,lllIA, PENLSYLVAXI1\,ASHI(JN()R'TO SOUTH- WARK FOUNDRY AND MAUI-UNI) COMPANY, ()lPHILADlaLPlilA vPORATION OF PJCNNS YLVANIA.

VALVE -ACTUATIN G ME CHANISM.

Specification of Letters Patent.

Application filed February 25, 1907.

Patented June 22, 1909.

Serial No. 359,288.

Towel! whom u! may concern:

' Be it known that I, Gns'rAv B. Persons, a

subject of the Emperor of Germany, residing in the city and county ofPhiladelphia, in the f State of Pennsylvania, have invented a cortainnew and, useful lIl'lPI'UVtJlltJlt in Valve- Actueting Mechanism. ofwhich the following is a true and exact description, reference being hadto the accompanying drawings, which form a part thereof.

My invention relates to valve actuating devices of the Corliss type andhas for its object to provide improved mechanism for actuating the hookin such devices and particularly for limiting the movements of the hookon pivotal attachment to the hook aetuati lever or levers.

Broadly speaking, my invention consists in providing an adjustablebull'er attachment adjust-ably secured to the hook actuating lever tolimit the pivotal movement of the hook as desired the butler attachmentpreferably acting on a rearward extension of the hook lever.

My invention also comprises special details of construction for thebuffer stop and also especial detailed improvmnents in the connection ofthe hook actuating shaft with the cam lever by which motion is given toit.

The nature of my improvements will be best understood described inconnection with the drawings in which they are illustrated and inwhich--- v Figure-Ids a side elevation of a (orliss valve actuatingmechanism provided with my improvements, the view being taken on thesection line 1 --1 of Fig. 2. Fig. 2, a plan view thereof, showingtheeonnection with the valve in section. Fig. 3, a side elevation of oneof the hook actuating lever members. Fig. 4, an elevation, partly insection on theline 4 -4 of Fig. 5, of the end of one of saidmembers andof the connected hook lever illustrating the buffer stop meclninismwhich I prefer to employ. Fig. 5 is a sec tional elevation on theline 5-5 of l ig. I.

Fig. 6 is a side elevation of the valve actuating lever on which thehook operates, nd

Fig. 7 is a view showing the mode of attach- 1 meat of the cam lever tothe hook lever shaft,

the view being taken partly in section on the line 7-7 of Fig. 2.

X indicates the shell of the engine cylinder having the port A formed init for the valve indicated at B, this valve having a slotted l groove l5formed in its end from the bottom of which extends the circularperforation B.

is the valve actuating shaft having a squared scction (7" lilting in thegroove 13" and a cylindrical extensi n which fits in the perforation13'.

l) is a st ulling box of the usual kind and l] the braclurt whichsupports the outer end of the shaft l is the valve actuating lever whichis l keyed to the shaft and has the two arms I and l, the arm l bcin'"secured to the usual dash pot through a connecting rod (2, and the arm ibeing provided with a usual hardened steel abutment l for thc engagementof the hook. 'lhc hub of the lever l is extended out on both sides asindicated at i thcse extensions s('-i'\'i!1g as bearings for thcspaccdapart lcvcrnn-mbcrs ll, ll. The two members ll are secured together andunite to form the. hook actuating lever. As shown, each member H isformed with three arms, the one ll connected with the actuating rod anothcr ll" supportin; the shaft of the hook lever, and the third, ll,support.- ing the spring M, which rests against the end of the hooklever, asimlicated in Big. 1.

it is the hook lcvcr having its arm li provided with a hardened steelabutment it adapted to engage the similar abutment l*' on the valvelver. 'lhis lever is foruu-d with a stop engaging rearward extension l\"The hook lever is secured to the shaft l. supported in bushings H heldin perforations ll" of the lcvc'r arms ll by set screws indicated at R.One end of the shaft 1 cxtends through to the outside of one of the hookactuating levers and this end. indicated at. l, see Fig. 7,-is cut awayso as to afford positive abut ment for the adjusting screws (l O lscrewing into opposite sides of the split clamping head N, of the camlevcr l\", the split head being also secured to the end I of the shafthy means of the clamp bolt t).

The ends .l' and lof a stop supporting pin. or shaft pass through theperforations in the Ilcver arms ll. 'lhis pin has between its ends aneccentric portion J preferably shorter than the space between the armsll j and advantageously greater in diameter than l the ends of the pins.

The bull'cr stop .lJ is in the form of a bushing surrounding theeccentric pin portion J and formed with a flattened side against which afacing L of leather, fiber or the like is secured by the countersunkscrews L The len of the bushing L is approximately equal to the distancebetween the lever arms Nuts J on the pin ends J and J 2 serve to drawarms H against the ends of the bush ing and clamp the parts togetherwith any esired angular adjustments of the pin and bushing L. A reducedportion J of the pin end J is shaped to receive wrench for adjusting thepin angularly when the nuts J are loosened. I

In adjusting the bushing L, as when new blocks K and F are inserted orthe like, the nuts or one of them are loosened and the stop supportingpin rotated to vary the position of its eccentric portion and thereby ofthe bushing L, and the latter is adjusted anularly so that the extensionK of the hook lever will properly engage the flat facing L, shown inFig. i, and the nuts J are then scrsved-home.

The general construction of the valve actuating mechanism shown in mydrawings and the devices for securing the shaft C to the valve new withme, but are not claimed in this application as they form the subjectmatter of my Patent No. 859,331, granted. July 9, 1907, on anapplication copending with this. 1

My present invention has reference entirely to the mechanism foractuating and regulating the action of the hook lever, the leading novelfeature in this mechanism being the provision of the adjustable bulierstop tor regulating the pivotal throw of this lever; thus, in theconstruction illustrated, which i believe to be the best form ofcmbodying the bull'or stop in the mechanism, the bushing L serves as abutler stop for the motion of the hook lever K which may be readily adjustcd whenever necessary to insure a proper engagement between the partsK and F and which by limiting the motion or" the hook insures a properoperation of the parts.

In operation the levers ll are oscillated back and forth in regularorder by the operative connection Q. As the connecting rod Q mowed tothe right the abutment 19 carried by the hook lover K engages theabutment F on the arm l of the valve actuating lever B, whereby thevalve spindle (l is turned with. the lovers ii to open the valve untilthe cam lever N engages the cam l and causes the abutment ii" to be putout of ongagomcnt with the abutment i The position oi the cam l isvaried in the usual manner to the governor connection, not shown, to thelever i carrying the cam P. When the abutment K" thrown out oiongagcmcnt with the abutment F the valve spindle is turned back to theclosed positionby the dash pot connection G. The device described andespecially illustrated in Fig. 7, enables the cam lever N} to be easilyand noiselessly adjusted at the end of the shaft I to thereby adjust theangular relation be tween the cam lever hi and the hook lever K, thusinsuring the actuation of the hook lever at the proper time. Themechanism disclosed. as a whole is particularly valuable in insuring thecorrect and noiseless adjustment and operation of the parts withpractically an elimination of all hammer blows which tend to distort theparts striking together and are besides undesirable by reason of thenoise produced.

. Having now described my invention, what I claim as new and desire tosecure by Letters Patent is 1, In a valve actuating device of theCorliss type, the combination of a hook actuating lover, a hook pivotedthereon, a butler stop to limit the pivotal movement of the hook,-andmeans for adjustably securing said stop to said lever.

2. In a valve actuating device of the Corliss type, the combination of ahook actuating lever, a hook pivoted thereon, and pro vided with a stopengaging portion, a pin adjustably secured to the actuating lever and abutler stop mounted on and angularly adjustable about saidpin.

3. In a valve actuating device of the Corliss type, the combination of ahookactuatin'g lever, a hook pivoted thereon and provided with anextension, and a buffer stop adj ustably secured to theactuating leverto engage the extension of the hook and limit the movement thereof.

4. In a valve actuating device of the Corliss type, the combination of ahook actuating lever, a hook pivoted thereon and provided with anextension, a pin secured to the actuating lever by means permittingangular adjustment of the pin, said pin having an eccentric portion, anda butler mounted on and angularly adjustable with respect to saideccentric portion of said pin.

5. In a valve actuating device ofthe Corliss type, the combination of ahook actuating lover having portions spread apart, a hook pivoted tosaid lever between said portions and having a stop engaging portion, acooperating stop, and means for adjustably securing said stop in placebetween said pontions.

(3. [.n a valve actuating device of the Corliss typo, tbcrombiuation ofa hook'actuatlug lover having portions spaced apart, a. hook pivoted tosaid lever between said p0r- Lions and having a stop engaging portion, acooperating stop and means for adjustably securing said stop iuplacebetween said portions, said means including means for-drawing said armstogether to grip the stopbetween them.

7'. in a valve actuating device of the vCor-- tween said portions andprovided with a sto en a in ortion a 006 eratin sto) D J b locatedbetween said arms and formed with an aperture, a pin journaled in saidlever and provided with an eccentric portion between the said leverportions which passes through the aperture of said stop and meansforvsecuring said pin to said arms in ditierent angular relations.

8. In a valve actuating device of tire Corliss type the oombinationof ahook actuatl l l l l ing lever having two portions spaoed apart, a hookpivotally secured "to said lever be tween said portions and providedwith a stop engaging portion, a cooperating stop L having an apertureformed in it and having the hook engaging lacing L, a pin having aneccentric portion J passing through said aperture,- and nuts on the endsof said pin for drawing said lever portions into engagement .with theends of said stop.

GUSTAV BERNHARD PETSCHE.

Witnesses:

ARNOLD KATZ, JOHN E. HUBBELL.

